/*
 * Copyright 2018 Sober Lemur S.a.s. di Vacondio Andrea and Sejda BV
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.sejda.commons.util;

import static org.junit.jupiter.api.Assertions.assertTrue;

import java.io.File;

import org.junit.jupiter.api.Test;

/**
 * @author Andrea Vacondio
 *
 */
public class NumericalSortFilenameComparatorTest {
    @Test
    public void nulls() {
        NumericalSortFilenameComparator victim = new NumericalSortFilenameComparator();
        assertTrue(victim.compare(null, new File("bla")) > 0);
        assertTrue(victim.compare(null, null) == 0);
        assertTrue(victim.compare(new File("bla"), null) < 0);
    }

    @Test
    public void nonDigit() {
        NumericalSortFilenameComparator victim = new NumericalSortFilenameComparator();
        assertTrue(victim.compare(new File("123.pdf"), new File("bla.pdf")) < 0);
        assertTrue(victim.compare(new File("bla.pdf"), new File("123.pdf")) > 0);
        assertTrue(victim.compare(new File("bla.pdf"), new File("abc.pdf")) > 0);
        assertTrue(victim.compare(new File("bla.pdf"), new File("bla.pdf")) == 0);
        assertTrue(victim.compare(new File("bla.pdf"), new File("bla123.pdf")) < 0);
        assertTrue(victim.compare(new File("123bla.pdf"), new File("123.pdf")) > 0);
    }

    @Test
    public void leadingDigits() {
        NumericalSortFilenameComparator victim = new NumericalSortFilenameComparator();
        assertTrue(victim.compare(new File("123.pdf"), new File("1bla.pdf")) > 0);
        assertTrue(victim.compare(new File("123bla.pdf"), new File("1bla.pdf")) > 0);
        assertTrue(victim.compare(new File("1.pdf"), new File("001bla.pdf")) > 0);
        assertTrue(victim.compare(new File("1bla.pdf"), new File("001bla.pdf")) > 0);
        assertTrue(victim.compare(new File("005bla.pdf"), new File("500.pdf")) < 0);
    }

    @Test
    public void trailingDigits() {
        NumericalSortFilenameComparator victim = new NumericalSortFilenameComparator();
        assertTrue(victim.compare(new File("123.pdf"), new File("bla1.pdf")) < 0);
        assertTrue(victim.compare(new File("bla 10.pdf"), new File("bla 1.pdf")) > 0);
        assertTrue(victim.compare(new File("1.pdf"), new File("bla001.pdf")) < 0);
        assertTrue(victim.compare(new File("bla1.pdf"), new File("bla001.pdf")) > 0);
        assertTrue(victim.compare(new File("bla005.pdf"), new File("500.pdf")) > 0);
    }

    @Test
    public void mixed() {
        NumericalSortFilenameComparator victim = new NumericalSortFilenameComparator();
        assertTrue(victim.compare(new File("bla 1.pdf"), new File("vol 10.pdf")) < 0);
        assertTrue(victim.compare(new File("20 bla 1.pdf"), new File("03 vol 10.pdf")) > 0);
        assertTrue(victim.compare(new File("20 bla 1.pdf"), new File("20 bla 5.pdf")) < 0);
        assertTrue(victim.compare(new File("banana.pdf"), new File("avocado.pdf")) > 0);
        assertTrue(victim.compare(new File("chuck.pdf"), new File("chuck.abc")) > 0);
        assertTrue(victim.compare(new File("1234file.pdf"), new File("chuck.abc")) < 0);
    }
}
